Alonzo t



(No Model.)

A. T-. CROSS. Stylogrmphio Pen.

No. 232,804. Patented 0a., 5, I880.

Witness es.

arrest PATENT ALONZO T. CROSS, OF PROVIDENCE, RHODE ISLAND.

STYLOGRAPHIC PEN.

SPECIFICATION forming part of Letters Patent No. 232,804, dated October5, 1880. Application filed May 27, 1880. (No model.)

To all whom it may concern:

Be it known that I, ALONZO T. Onoss, of Providence, in the State ofRhode Island, have invented an Improvement in StylographicFountain-Pens, of which the following is a specification.

The nature of my invention consists in a centrally-arranged air-tube,closed at its upper end by means of a removable plug, and having asideaperture made near the bottom of the plug, for the proper admission ofair to the inkchamber, under the control of a vent-cap.

It also consists in providing means for the passage of air from theair-tube into the inkchamber to control the flow of ink to the point ofthe pen by slotting the lower end of the air-tube, or an extensionthereof, and connecting loosely thereto the cylindrical upper portion ofthe vibrating spindle, so that the vibration of the spindle in the actof writing may assist in passing the air into the ink-chamber.

My invention also consists in a removable point-tube frictionally heldin a point-section provided interiorly with a contraction or shoulder,serving to limit the degree of insertion of the tube.

Figure 1 represents the exterior of the pen when completely closed forcarrying in the pocket. Fig. 2 is a longitudinal section. Fig. 3 is atransverse section taken in the line as w of Fig. 4. Fig. 4 is anenlarged longitudinal section of the point-section of the pen.

In the accompanying drawings, A is the in kreservoir, preferably made ofhard rubber or similar material; B, the point-section; O, the vent-cap;D, the centrally-arranged air-tube, and E the point-cap.

The upper end of the air-tube D is closed by the screw-plug d, a smallaperture, b, being made from the side of the screw a to the airtube. Theplug (1 serves to prevent persons from i gnoran tly attempting to fillthe pen with ink through the air-tube, as heretofore, and at the sametime permitting access to the interior of the air-tube in case ofnecessary cleaning by simply removingthe plug.

Whenever a drop of ink has entered the airtube and the pen is reversedfor carrying in the pocket the ink will flow past the orifice 1) towardthe plug 61 without being forced out of the vent-aperture, so as toreach the thread of the screw, as heretofore. The screw a is preferablymade in one piece with the hard-rubber reservoir A, thus avoiding ajoint liable to work loose in screwing down the vent-cap.

The lower end of the air-tube or its extensions is provided with one ormore open slots, 0, which abut upon the loose washer F, held against theend of the tube by means of the spindle-actuatin g spring G. Theenlarged cylindrical portion of the spindle H enters the bore of thetube D to about the upper end of the slot 0, and is loosely held bymeans of the pin I passing through the slot It made in the enlargementof the spindle. The vibrating movement of the spindle caused by the actof writing tends, in this case, to assist the air to pass in smallbubbles from the air tube through the upper end of the slot 0 into theink-chamber, thus properly graduating the supply of ink to the point ofthe pen.

The lower end of the bore of the point-section Bis provided with acontraction or shoulder, 0, which serves to limit the degree ofinsertion of the frictionallyheld point-tube J. The lower end of thepoint-tube is drilled out to receive the tubular wear-resisting tip K,which rests against the shoulder j, the upper end of the tube K beingslightly countersunk in order to suitably guide the insertion of thespindle when placing the point-section upon the handle or reservoir ofthe pen.

In stylographic fountain-pens as heretofore constructed the point-tubehas been permanently secured to the point-section, so that in case ofwear or injury it has been necessary to adapt a new point-section to thehandle or reservoir, which involves a considerable unnecessary expense;but by my improvement the point-tube is simply held by slight friction,so that it may be readily withdrawn and a new one inserted whennecessary, thus avoiding the waste of the hard-rubber point-section. Thecontraction or shoulder in the bore of the point-section serves as astop to limit the insertion of the point-tube to its proper relationwith the point of the writing-spindle without the necessity of specialadjustment.

I claim as my invention- 1. In a fountain-pen, the combination of avent-cap, G, with an air-tube, D, closed at its upper end by a removableplug, cl, and provided with a side orifice, I), located below the plugand covered by the vent-cap, substantially as described.

2. In a fountain-pen, the air-tube D, provided with one or more openslots or notches, 0, made at its lower end, in combination with theenlarged portion of the vibrating spindle H, which enters the bore ofthe air-tube to a point near the upper end of the slot 0, and is looselyheld by means of the pin I and slot h, and operated by the spring G, sothat in the act of writing the vibration of the spindle will serve toassist the passage of air from the lower portion of the air-tube to theink-chamber.

3. In afountain-pen, the removable frictionally-held point-tube J, incombination with a point-section, B, provided with a contraction orshoulder, e, substantially as and for the purpose set forth. 1

' ALONZO T. onoss.

Witnesses:

JOSEPH J. SOHOLFIELD, H. W. HUBBARD.

